The document provides an overview of computer memory, detailing its definitions, classifications, and types. It explains internal memory, main memory (including RAM and ROM), and secondary memory, along with their characteristics and roles in a computer system. It also includes a breakdown of memory measurements from bits to terabytes.

1. Computer Memory
Presented By
Most. Arifa Khatun Bithi
191-35-2656 | 28th Batch
Department of Software Engineering
Daffodil International University
Course Teacher
Nusrat Jahan
Senior Lecturer
Department of Software Engineering
Daffodil International University
August 5, 2020

2. 2
Introduction
 Electronic components that store instructions, data, and results
 Consists of one or more chips on motherboard or other circuit board
 Each byte stored in unique location called an address, similar to seats
in a concert hall

3. 3
Memory Measure
 Bit Smallest Unit of Computer Memory
 Byte 8 Bit 1 Byte
 Kilo Byte (KB) 1024 Byte 1 KB
 Mega Byte (MB) 1024 KB 1 MB
 Giga Byte (GB) 1024 MB 1 GB
 Tera Byte (TB) 1024 GB 1 TB

4. 4
Classification of Computer Memory
Memory
Internal
Main
Secondary

5. 5
Internal Processor Memory
 A small high speed memory inside the processor
 Temporary storage of instruction and data
 Example: Registers, Built-in cache

6. 6
Main Memory
 It is relatively large memory placed outside the processor
 Data and instruction storage for the operation of the processor
 Can be accessed directly and rapidly by the CPU

7. 7
Image of Main Memory

8. 8
Types of Main Memory
Main
RAM ROM

9. 9
Random Access Memory (RAM)
 It is also called as read write memory or the main memory or
the primary memory.
 It is a volatile memory as the data loses when the power is turned off
 Every location can be accessed independently
 Access time for every location is constant and independent of it’s
position.

10. 10
Types of Random Access Memory
RAM
Dynamic Static

11. 11
Read Only Memory (ROM)
 A class of storage used in computer and other electronic devices
 Data stored in it cannot be modified
 Non-Volatile memory
 Used in calculators and peripheral devices

12. 12
Types of Read Only Memory
ROM
PROM EPROM EEPROM

13. 13
Secondary Memory
 Permanent storage of data and instruction
 Much larger in capacity but slower than main memory
 Example: Hard disk, CD, Floppy etc.

14. Any Question?

15. 15
Reference
[1] www.tutorialspoint.com
[2] www.geeksforgeeks.org
[3] www.arrow.com

16. Thank you…